Take a look at the Queen Kaahumanu Hwy on the western coast of Hawaii’s Big Island, and for miles and miles you’ll see white graffiti laid out over the hardened, black lava fields! Not to worry however, the messages aren’t made from any kind of paint; they are built with white coral stones which are either collected from the nearby beach, or recycled from older messages. It’s actually an old local tradition that seems to have morphed into a new kind of social networking. The messages can change frequently due to reuse of the rocks, but some of…